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authorJeff Layton <jlayton@redhat.com>2012-12-11 12:10:06 -0500
committerAl Viro <viro@zeniv.linux.org.uk>2012-12-20 18:50:01 -0500
commit7955119e02d9fdf78a39fba8073f19ca6152613e (patch)
tree163bfbf2174ca89d541f63b0114b16665e02e6e5 /fs
parent836fb7e7b978e5f3b8b52e40838ddc50264723f0 (diff)
downloadop-kernel-dev-7955119e02d9fdf78a39fba8073f19ca6152613e.zip
op-kernel-dev-7955119e02d9fdf78a39fba8073f19ca6152613e.tar.gz
vfs: fix readlinkat to retry on ESTALE
Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs')
-rw-r--r--fs/stat.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/fs/stat.c b/fs/stat.c
index d221995..14f4545 100644
--- a/fs/stat.c
+++ b/fs/stat.c
@@ -300,11 +300,13 @@ SYSCALL_DEFINE4(readlinkat, int, dfd, const char __user *, pathname,
struct path path;
int error;
int empty = 0;
+ unsigned int lookup_flags = LOOKUP_EMPTY;
if (bufsiz <= 0)
return -EINVAL;
- error = user_path_at_empty(dfd, pathname, LOOKUP_EMPTY, &path, &empty);
+retry:
+ error = user_path_at_empty(dfd, pathname, lookup_flags, &path, &empty);
if (!error) {
struct inode *inode = path.dentry->d_inode;
@@ -318,6 +320,10 @@ SYSCALL_DEFINE4(readlinkat, int, dfd, const char __user *, pathname,
}
}
path_put(&path);
+ if (retry_estale(error, lookup_flags)) {
+ lookup_flags |= LOOKUP_REVAL;
+ goto retry;
+ }
}
return error;
}
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